Construction a Golden Rectangle

[Acorn]

This Challenge allegedly has deep connections to art, geometry and our psyche.

The Golden Ratio is calculated to be 1.618::1.
It describes a pattern that is found in sunflowers, playing cards, architecture and web design layout.

Here are two presentations of a Golden Rectangle where the sides are in Golden Ratio proportion:

Attachment 122576

Now it can be shown that the Golden Ratio is integral to the pentagon, where it is Diagonal Length::Edge Length:


It is therefore possible to construct the blue Golden Rectangle from this knowledge, as shown.

In this Challenge, I wish you to uncover a simpler construction of the Golden Rectangle.

Acorn

P.S. Phi (ɸ) is (√5 + 1) / 2 ≃ 1.6180339887498948482045868343656